Electric heating and surface-finishing device



Nov. 6, 1928. 1,690,831

M. NIETO ELECTRIC HEATING AND SURFACE FINISHING DEVICE Filed Feb. 25, 1928 lNV ENT 0 Manuel Me a B W ATTORNEY Patented 6,. 192 8. i

. UNITED STATE PATENT 'or'rilca MANUEL metro, or. BROOKLYN, n w roan, ssmnon or ONE-FOURTH To rnancrsco I oPEz, or NEW 031:.

ELECTRIC EATING AND sUnrAcn-rrmsnmc; DEVICE.

Application filed February 25, 1928. Serial no. 2563835.

This invention relates generally to heat ing devices, and has more particular reference to a heating device for obtaining a a smooth neatfinish-on plaster work in the initial stage of drying. More specifically stated the device isintended for use on theplaster. oi the walls and ceilings of rooms, though it is not limited to this use only. The invention has for an object theprovision-of a device of the class mentioned,

which is of simple durable construction, desirable andefiicient in use, and whlcli can be manufactured and sold at a reasonable cost. a

, The device has a substantially semi-cylindrical plaster engaging memberwith all lat- I erallongitudinal elements of curved formagaged within the hollow of the plaster memtion,:ind this member isot hollow construc tion of 'V-cross section. 'A winding backing member. of U-cross section has a, heating winding attached to its outer side and isenher. A she llsupports the plastermember and a stem connects with the shell. The leads from the heating winding extend thru the stem, and'connect with'a rheostat attached at one end of the stem, and at the other end to a handle for manipulating the device. The

plaster engaging member ma be .ofvarious lengthsidepending upon the SlZB'Ofjtl jobthe device is to be usedon. The winding backing men'iber'may'be adjustably mounted to be movable relative to the plaster member. as a meansfor changing the heat radiationfrom the winding 'tothe plaster member. I For further comprehension of the 1111 911.

- tion, and ofthe objects and advantages there'- of, reference will be had tothe following des scription and accompanying drawings, and

to the appended claims in whichqthe various novelfeatures of the invention aremore particularly set forth. I Referringto the accompanying drawing, forming a material part of this construc tion: Fig. 1 is a front view'of a device of the class mentioned. I a

Fig. 2 is a side viewthereof.

Fig. 3 is a fragmentary'vertical sectional view, taken. on the line 3-3of Fig.1.

Fig. 4 is afragmentaryface view of the inner side of the plaster engaging member.

Fig. 5 is a fragmentary frontview of the lhell and stemof the device.

Fig. 6 is a fragmentary vertical sectional ments of curved formation, as for example indicated by numerals 11, and being of hollow construction, substantially V-shaped in cross section. A flange 12 extends completely around the back side of the plaster member,

,and the ends. of the plaster member are formed w th semi-circular lug recesses 13. H

lhismember 10 is made from insulating material, as hard rubber, or some fibrous coinposition. I

A shell 14 engages over the flange 12 and has end lugs 15 engagingthe recesses 13. while screws 16 engagethe lugs 15 and the member 10 holding these parts together. A tubular stem 17 communicates with the interior of theshell. A winding backing member 18 of thesame material as member 10, is of V-shaped cross section, and has a heating winding 19 attached to its outer side. This winding andmember 18 engage within the hollow ofthepla'ster member 10. One end of the winding 19 connects with a contact arm 20, and theother end with contact arm 21. These contact arms. connect with conductor strips'23 supported to the shell 1%,, but insulated therefrom. A pair of leads'2 l connect with the strips 23, and extend thru the stem 17 to a rheostat within the rheostat casing 25. The rheostatis operatedby a control wheel 26. A tubular handle 2 7 is attached to the rheostat, and an electric cable 28 extends thru the handleto the rheostat.

Slide members 29 project from the rear side of the winding member 18, and slidably ill 27, and moved so that the plaster member 10 rubs up and down upon plaster in a state of drying. A very neat and smooth finish is thus put on the drying plaster. Supplementing the heat control of the device by means of the rheostat, are the adjusting screws 31. The lock nuts 32 may be loosened, and the screws turned to move the heating winding from the rear of the member 10, then the lock nuts reengaged.

Peter-ring in particular to Fig. 7, a plaster L I mg member 10 is illustrated, of exceptional length. In cases where very lar e surfaces are to be treated with the invention de vice, the long member 10 may be advantageoivl used.

l i 3 illustrates a plaster engaging member 10 so positioned that its length lies in the same direction as the length of stem 1?. Certain persons may find this term more convenient than the first described-form.

It is to be understood th not only plaster may be finished by means or" this device but also other substances which may be used for substituting plaster such a in .ure oi cement, lime and powdered marble. Vi here better grade work and appearance is desired, for instance in hospitals and dormitories, lime and pulverized marble may be mixed with gypsun'i and the worl-z finished with my device which makes t e wa l waterproof, washable and allows original color to remain on the wall regardless of how 'lrequently the wall is washed.

lVhile l have shown and described a preferred embodiment of my invention, it is to be understood that I do not limit myselt'to the precise construction herein disclosed and the right is reserved to all changes and modifications coming within the scope o'r' the invention as defined in the appended claims.

Having thus described my invention what I claim as new and desire to secure by United States Letters Patent is 1. A device of the e ti described, comirising a plaster enga 1; member of hollow construction, a winning backing member supporting winding, engaged therein, a shell attached to the plaster engaging memher, a stem connected with the shell, and bar dling means connected with the stem, the winding backing member being provided with projecting slide members engaging guide members projecting from the shell, and a means for adjusting the position of the winding member relative to the plaster engaging member. 7

2. A device of the class described, comprising a plaster engaging member of hollow construction, a winding backing member supporting a 'inding, engaged therein, a shell attached to the plaster engaging member, a stem connected with the shell, and handling means connected with the stem, the wimling backingmcmber being arranged for sliding within the shell, and screws rotatively connected with the winding backing member, and threadedly en aging the shell, as a means for adjusting the position of the winding relative to the plaster engagingmember.

8. A device of the class described, comprising a plaster engaging member of hollow construction, a winding backing member supporting a winding, engagedtherein, a shell attached to the plaster engaging member, a stem connected with the shell, and handling means connected with the stem, the winding backing member being provided with projecting slide members engaging guide members projecting from the shell, and screws rotatively connected with the winding backing member, and threaded v eng ng the shell, as a means for adjusting the position of the winding member relative to the plaster e11- gaging member.

i. A device of the class described, comprising a plaster engaging member of hollow construction, a winding backing-member supporting a winding, engaged therein, a shell attached to the plaster engaging member, a stem connected with the shell, and handling means connected with the stem, the winding backing member being provided with pro jecting slide members engaging guide members projecting from the shell, and screws rotatively connected with the winding bachmcmber, and threadedly engaging the shell, as a means for adjusting the position of the winding member relative to the plaster engaging member and lock nuts engaging the screws and abutting the shell.

In testimony whereof I have allixed my signature.

MANUEL NIETO. 

